this assembly allows for a "live" service—it can be replaced under pressure in most residential applications without the need to drain the entire heating loop

and multi-stage thermostats simultaneously

This magnetic head for gas valves is compatible with various Robertshaw TSJ and Unitrol series valve bodies

and Hytrel inserts

Constructed with high-grade metallized polypropylene film and a proprietary epoxidized soybean oil dielectric

Spirax-Sarco 67225F Diaphragm Els PW 17895 this assembly allows for aThe Spirax Sarco 67225F Diaphragm is a critical replacement component for maintaining the integrity of 25P Series pressure reducing valves. This kit contains two stainless steel pilot diaphragms designed to interface with the L4 pressure pilot assembly, ensuring precise modulation of steam or high temp fluids. As a veteran grade service part, the 67225F is compatible with the full range of 25 Series pilots, including the 25PT, 25PE, 25PA, and 25BP